Question 1

Your vessel drags anchor at night in a crowded anchorage. You are being set towards other anchored vessels. Your main engine will take 15 minutes to reach manoeuvring readiness. What signals must you display and what is your COLREGs status?

Accepted Answer

Immediate signals and status: (1) SOUND SIGNAL — Rule 35(h): a vessel at anchor which drags shall sound the bell signal prescribed in Rule 35(g) (anchor bell signal — rapid ring for 5 seconds every minute) AND in addition may sound three short blasts in succession to warn an approaching vessel of the danger; (2) LIGHTS — while the anchor is on the bottom and you are still "at anchor" display anchor lights (Rule 30); if the anchor is aweigh and you are unable to manoeuvre, change to NUC lights (two all-round red vertical) and sound NUC fog signal (2 prolonged + 1 short every 2 min if making way in restricted visibility); (3) STATUS — while dragging with anchor still holding partially: you are "at anchor" in status; once the anchor is aweigh and you cannot manoeuvre under power, you are NUC; (4) VHF Ch 16 — broadcast a warning to other vessels in the anchorage: "All vessels, all vessels, [vessel name] dragging anchor, position [description], unable to manoeuvre for 15 minutes."; (5) Let go the second anchor if fitted and if it will help arrest the drag. Dragging anchor is one of the most acute emergency situations in an anchorage. The COLREGs signals: Rule 35(h): in restricted visibility, a vessel at anchor that drags shall give the bell signal and additionally sound three short blasts. In clear weather: the visual signals are the primary warning to other vessels. The transition from "at anchor" to "NUC" status: a vessel that has broken out its anchor and cannot manoeuvre is genuinely not under command — the NUC lights are the appropriate signal and provide other vessels with the Rule 18 obligation to keep clear. VHF warning broadcast: there is no specific COLREGs provision requiring a VHF warning when dragging, but GMDSS operational guidelines and sound seamanship require alerting nearby vessels by the fastest available means. The anchorage community broadcast on Ch 16 gives maximum warning. Letting go the second anchor: this is a practical measure to arrest the drag — it works best if the second anchor is dropped ahead and to one side of the first, creating a two-anchor spread. In a crowded anchorage, the critical constraint is time — 15 minutes to engine readiness may be too long if the vessel is drifting at 0.5-1 knot towards other vessels 0.2-0.3nm away.

Question 2

Your charterer is demanding you maintain 16 knots to arrive on schedule. Visibility has dropped to 0.5nm in fog. Your safe speed assessment suggests 6 knots maximum in these conditions. The charterer threatens to claim laytime damages. What is your position under COLREGs and ISM?

Accepted Answer

COLREGs Rule 6 (Safe Speed) and ISM Regulation 5 (Master's Overriding Authority) together create an absolute obligation: the Master must navigate at safe speed regardless of commercial pressure. A speed that allows the vessel to stop within half the visibility distance or less is the practical test in restricted visibility. At 0.5nm visibility with significant traffic risk, 6 knots or less is likely necessary. ISM Code Reg 5: "The Company shall establish in the SMS that the Master has the overriding authority and the responsibility to make decisions with respect to safety and pollution prevention and to request the Company's assistance as may be necessary." The charterer's laytime claim cannot override the Master's safety obligation. Action: reduce to safe speed; document the decision in the OLB with the meteorological conditions and COLREGs reasoning; inform the company in writing; request the company provide written confirmation if they want you to maintain speed (they will not do so as it would make them complicit). A collision caused by excessive speed in fog would expose the Master personally to criminal prosecution under the Merchant Shipping Act 1995. Commercial pressure versus safety is the paradigm Master-level examination question. The legal position is unambiguous: COLREGs are statutory regulations, not guidelines. Rule 6 imposes a legal duty on the Master — it is not a discretionary standard. A breach of Rule 6 that results in a collision constitutes a criminal offence under the Merchant Shipping Act 1995 Section 58 (misconduct endangering ship or persons on board) and potentially Section 131 (oil pollution). The Master is personally exposed — not just the company. Laytime and commercial damages: a time charterer's laytime claim arising from weather-related slow steaming is a commercial dispute handled through the P&I Club and the voyage charter provisions. A successful laytime claim costs money; a conviction for causing a collision through excessive speed costs the Master their certificate and potentially their freedom. The ISM system specifically creates the "overriding authority" provision to give Masters a clear documented basis for resisting commercial pressure — the OLB entry and company communication create a contemporaneous record.

Question 3

Your vessel collides with another vessel in a TSS. Two crew members on the other vessel are injured. Investigations show your OOW was on the correct side of the TSS but failed to take avoiding action in time. As Master, what is your criminal liability exposure?

Accepted Answer

Criminal liability exposure for the Master: (1) Merchant Shipping Act 1995 Section 58 — Conduct endangering ship or persons on board: "A master of, or seaman employed in, a United Kingdom ship who, while on board the ship, does any act which causes or is likely to cause the loss or destruction of or serious damage to his ship or the death of or serious injury to a person on board his ship is guilty of an offence." This applies where the Master failed in their supervisory duty; (2) MS Act 1995 Section 100 (manslaughter) and Gross Negligence Manslaughter (common law) — if injury leads to death, the Master may face manslaughter charges if their conduct was grossly negligent; (3) ISM duty: failure to ensure adequate bridge watchkeeping and OOW supervision; (4) The Master is also exposed to personal P&I subrogation claims if found personally negligent. The fact that the OOW was technically compliant with lane navigation but not with COLREGs Rule 8 timing raises questions about bridge supervision and watchkeeping instruction under the Master's standing orders. Masters are regularly prosecuted following collisions — this is not theoretical. The MS Act 1995 creates specific criminal offences for masters and seafarers. Section 58 covers "conduct endangering" — it does not require injury; the potential to cause injury is sufficient. For serious injuries or deaths, the Crown Prosecution Service (CPS) will consider gross negligence manslaughter charges. The Master's supervisory responsibility: even when not on the bridge, the Master is responsible for ensuring the watchkeeping system is fit for purpose — standing orders must specify safe speed, calling the master procedures, and COLREGs compliance requirements. If standing orders were inadequate and the OOW failed to follow safe practices, the Master bears some responsibility. Case law: Captains of numerous vessels have been prosecuted under MS Act provisions following collisions in UK waters — including the incidents in the Thames Estuary and Solent area. The MAIB investigation report following a collision will normally address criminal liability questions separately from the safety investigation.